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IEICE TRANSACTIONS on Information

Paraphrase Lattice for Statistical Machine Translation

Takashi ONISHI, Masao UTIYAMA, Eiichiro SUMITA

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Summary :

Lattice decoding in statistical machine translation (SMT) is useful in speech translation and in the translation of German because it can handle input ambiguities such as speech recognition ambiguities and German word segmentation ambiguities. In this paper, we show that lattice decoding is also useful for handling input variations. “Input variations” refers to the differences in input texts with the same meaning. Given an input sentence, we build a lattice which represents paraphrases of the input sentence. We call this a paraphrase lattice. Then, we give the paraphrase lattice as an input to a lattice decoder. The lattice decoder searches for the best path of the paraphrase lattice and outputs the best translation. Experimental results using the IWSLT dataset and the Europarl dataset show that our proposed method obtains significant gains in BLEU scores.

Publication
IEICE TRANSACTIONS on Information Vol.E94-D No.6 pp.1299-1305
Publication Date
2011/06/01
Publicized
Online ISSN
1745-1361
DOI
10.1587/transinf.E94.D.1299
Type of Manuscript
PAPER
Category
Natural Language Processing

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